$\frac{5+y}{5}+\frac{5+z}{6}$

$\lim_{x\to\infty}\left(\frac{3x^2-1}{x^3+4}\right)$

$\int\:\frac{sin^5\left(2x\right)}{\sqrt{cos\left(2x\right)}}dx$

$\int\:\frac{\left(2t+1\right)}{2\left(t^2+t\right)}dt$

$\lim_{x\to0}\left(\frac{x-4}{x-\sqrt[2]{8-x}}\right)$

$\frac{x^2-15x+25}{x-5}$

$\left(4m+5n^3\right)^2$